package eu.siacs.conversations.parser; import java.util.List; import net.java.otr4j.session.Session; import net.java.otr4j.session.SessionStatus; import android.util.Log; import eu.siacs.conversations.entities.Account; import eu.siacs.conversations.entities.Conversation; import eu.siacs.conversations.entities.Message; import eu.siacs.conversations.services.XmppConnectionService; import eu.siacs.conversations.xml.Element; import eu.siacs.conversations.xmpp.stanzas.MessagePacket; public class MessageParser { protected static final String LOGTAG = "xmppService"; private XmppConnectionService mXmppConnectionService; public MessageParser(XmppConnectionService service) { this.mXmppConnectionService = service; } public Message parsePlainTextChat(MessagePacket packet, Account account) { String[] fromParts = packet.getFrom().split("/"); Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, fromParts[0],false); String body = packet.getBody(); return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_NONE, Message.STATUS_RECIEVED); } public Message parsePgpChat(String pgpBody, MessagePacket packet, Account account) { String[] fromParts = packet.getFrom().split("/"); Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, fromParts[0],false); return new Message(conversation, packet.getFrom(), pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECIEVED); } public Message parseOtrChat(MessagePacket packet, Account account) { boolean properlyAddressed = (packet.getTo().split("/").length == 2) || (account.countPresences() == 1); String[] fromParts = packet.getFrom().split("/"); Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, fromParts[0],false); String body = packet.getBody(); if (!conversation.hasValidOtrSession()) { if (properlyAddressed) { Log.d("xmppService","starting new otr session with "+packet.getFrom()+" because no valid otr session has been found"); conversation.startOtrSession(mXmppConnectionService.getApplicationContext(), fromParts[1],false); } else { Log.d("xmppService",account.getJid()+": ignoring otr session with "+fromParts[0]); return null; } } else { String foreignPresence = conversation.getOtrSession().getSessionID().getUserID(); if (!foreignPresence.equals(fromParts[1])) { conversation.resetOtrSession(); if (properlyAddressed) { Log.d("xmppService","replacing otr session with "+packet.getFrom()); conversation.startOtrSession(mXmppConnectionService.getApplicationContext(), fromParts[1],false); } else { return null; } } } try { Session otrSession = conversation.getOtrSession(); SessionStatus before = otrSession .getSessionStatus(); body = otrSession.transformReceiving(body); SessionStatus after = otrSession.getSessionStatus(); if ((before != after) && (after == SessionStatus.ENCRYPTED)) { Log.d(LOGTAG, "otr session etablished"); List messages = conversation .getMessages(); for (int i = 0; i < messages.size(); ++i) { Message msg = messages.get(i); if ((msg.getStatus() == Message.STATUS_UNSEND) && (msg.getEncryption() == Message.ENCRYPTION_OTR)) { MessagePacket outPacket = mXmppConnectionService.prepareMessagePacket( account, msg, otrSession); msg.setStatus(Message.STATUS_SEND); mXmppConnectionService.databaseBackend.updateMessage(msg); account.getXmppConnection() .sendMessagePacket(outPacket); } } mXmppConnectionService.updateUi(conversation, false); } else if ((before != after) && (after == SessionStatus.FINISHED)) { conversation.resetOtrSession(); Log.d(LOGTAG,"otr session stoped"); } //isEmpty is a work around for some weird clients which send emtpty strings over otr if ((body == null)||(body.isEmpty())) { return null; } return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED); } catch (Exception e) { conversation.resetOtrSession(); return null; } } public Message parseGroupchat(MessagePacket packet, Account account) { int status; String[] fromParts = packet.getFrom().split("/"); Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, fromParts[0],true); if (packet.hasChild("subject")) { conversation.getMucOptions().setSubject(packet.findChild("subject").getContent()); mXmppConnectionService.updateUi(conversation, false); return null; } if ((fromParts.length == 1)) { return null; } String counterPart = fromParts[1]; if (counterPart.equals(conversation.getMucOptions().getNick())) { if (mXmppConnectionService.markMessage(conversation, packet.getId(), Message.STATUS_SEND)) { return null; } else { status = Message.STATUS_SEND; } } else { status = Message.STATUS_RECIEVED; } String pgpBody = getPgpBody(packet); if (pgpBody==null) { return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status); } else { return new Message(conversation, counterPart, pgpBody, Message.ENCRYPTION_PGP, status); } } public Message parseCarbonMessage(MessagePacket packet,Account account) { int status; String fullJid; Element forwarded; if (packet.hasChild("received")) { forwarded = packet.findChild("received").findChild( "forwarded"); status = Message.STATUS_RECIEVED; } else if (packet.hasChild("sent")) { forwarded = packet.findChild("sent").findChild( "forwarded"); status = Message.STATUS_SEND; } else { return null; } if (forwarded==null) { return null; } Element message = forwarded.findChild("message"); if ((message == null) || (!message.hasChild("body"))) return null; // either malformed or boring if (status == Message.STATUS_RECIEVED) { fullJid = message.getAttribute("from"); } else { fullJid = message.getAttribute("to"); } String[] parts = fullJid.split("/"); Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, parts[0],false); return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status); } public void parseError(MessagePacket packet, Account account) { String[] fromParts = packet.getFrom().split("/"); mXmppConnectionService.markMessage(account, fromParts[0], packet.getId(), Message.STATUS_SEND_FAILED); } public String getPgpBody(MessagePacket packet) { Element child = packet.findChild("x", "jabber:x:encrypted"); if (child==null) { return null; } else { return child.getContent(); } } }